4. Walking billboard

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When a business cannot afford a real billboard, they hire a person to hold a sign. If an inanimate object can do a job more effectively and for longer, the person’s intellect really comes into question. These people are usually positioned on busy streets, forcing them to breathe constant car exhaust and dodge projectiles thrown by teenagers. Apocalypse freaks also work in this field pro bono by wearing sandwich boards with “The End is Near.”

Sole perk to the profession: It takes zero brainpower and Bret from The Flight of the Conchords worked this job on their TV series.